Go back and finish the drive ends before cover-up. The ends should be secured/controlled per shop practice so the drive cannot walk loose and sharp edges are not left exposed.
Look where hands, insulation, or ceiling work will hit
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In Rectangular Duct Assembly: S-and-Drive, I’m looking at: What do I do when I forgot to fold or tab the drive ends? What should I verify before I cut, drill, seal, cover, move, or install?
